if the motor is real nice mabey 6k tops. most likely in the 3500 to 5000 range. cj5's are nice, and getting harder to find in decent shape. some glass bodies will flex and crack around the body mount locations, check there. check where the brake pedals and brake master mount, common to crack there. check the front frame horns for cracks/repairs, pay close attention around the steering box mount. check for cracks where he sunk the blazer tail lights, i hate cutting a glass body. look for frame patches near the rear spring hangers, and the ladder bar too. if it has been "sprayed" much i would wanna see the inside of that engine. personally i would not like a used engine that had used nos. amc motors are not the strongest motors internally.
it looks nice, but pictures only tell so much.